Home / 645,230.34-890,165.87-369,440.81

Finding the Fourth Proportional to 645,230.34, 890,165.87 and 369,440.81

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Solution

The fourth proportional to 645,230.34, 890,165.87 and 369,440.81 is: 509,684.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,230.34 : 890,165.87 = 369,440.81 : x
  2. Step 2: Convert to fraction form
    645,230.34/890,165.87 = 369,440.81/x
  3. Step 3: Cross multiply
    645,230.34x = 890,165.87 × 369,440.81
  4. Step 4: Simplify right side
    645,230.34x = 328,863,604,172.53
  5. Step 5: Solve for x
    x = 328,863,604,172.53/645,230.34
  6. Step 6: Final answer
    x = 509,684.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.